Milling-machine



G. D. SUNDSTRAND.

MILLING MACHINE.

APPucAnoNmgD APR. 30. |919.

mm1 sept. 14,1920.

Vspringing of orricr..

sUsrAr' DAVID sUNDsTR'AND, or" nocxronn, ILLINOIS, AssIGNon ,To nocxronn MILLING MACHINE COMPANY, or nocKFoRD, ILLINOIS,- A-conPonA'rIoN or ILLINOIS.

MILLINGtMAcHINE. l

' f Application led April 30,

To all whom t may concern:

Be it known that I, GUsTAF DAVID SUNn- STRAND, a citizen of the United States, residing at Rockford, in the countyv of Winnebago and State of Illinois, have invented certain new and useful Improvements in Milling-Machines, of which the following is a specification.

Milling machines, as commonly constructed, comprise a column uponfwhich aknee is vertically slidable, said knee carrying a horizontally movable saddle,and the saddle carrying a horizontally movable table. The column is provided'with a base which projects beneath the knee.' The means 'for vertically moving the knee comprises a screw and nut interposed between the knee and said projecting portion of the base..

To illustrate the difficulty which'the present inventionobviates', let us assume that the knee weighs,l say 600 lbs.; the saddle per'- haps 300 lbs.; and the table possibly 600 lbs. It may be further assumed that vthe saddle has been fedto the outer end of the knee and that there is a weight of perhaps 500 to 1000 lbs. upon the table. If now it is desired to raise the knee, say, one one'- thousandth of an inch, the screw, when operated to produce this amount ofv movement, may,-in fact, not move the knee at all, the base springing with reference to the column. The failure of the knee to move is dueto'a certain amount of binding between the knee and its guide on the column on account of the over-hanging weight. If'the operator makes another attempt to more the knee one one-thousandth of an inch by again operating the screw, the resistance 'dueto binding may be overcome, thus releasing the tension inthe base and causing the knee Vto movel through' a distance-of two onethousandths of an inch. I

The object ofthe present invention is to prevent such irregular and unreliable operation of the knee. Ihis objectV has been obtained by the employment of means to stilfen the base and the. column'so'as to prevent the `base with referencev to the column.

In the accompanying drawing, Figure 1 is a fragmental side elevation of a milling machine embodying the features of my invention. Fig. 2 is a fragmental sectional view 1919. serial No. 293,869.

2 upon its forward side upon whichV guide the knee 3 is mounted.

VSpecification of Letters Patent. Patentedisept. 14:, 1920.

On the knee 3 is a saddle 4 movable toward Y.

and away `from the column. The saddlecar- -ries a table 5.

VThe column 2 is provided with ak base 6 having a portion 7 which extends forward beneath the knee. between the knee 3 and'abearing 9 on the base portion 7.

8 is a screw interposed To stifen the Aframe and prevent relative movement between the column 1 and the base portion 7, I provide within the lower portion ofthe'hollo'w column a horizontal webv 10 extending rearwardly from the front wall of the column, a vertical web 11 extending from the rear portion of theweb 10 to the base 6, said webs 10 and 11 extending from one side wall of the column to the other, and a vertical web 12extending from the front wall of the column to the web 11,

and from the web `10 to the base, the web 12 -being midwayv between the side walls ofthe column 1. The webs, 10', 11vand 12, being located within the angle formed-between the Y rear wall of thecolumn is divided by a central vertical partition 13 into two compartments 1lik and 15 which may be used as oil reservoirs or receptacles.

.front wall of the column and the base, serve As will be understood, the column 1, the

base 6 and the webs 10,11, 12 and 13 constitute, in practice, a single casting. Vebs 12 and 13,-being1in alinement, constitute a single rib, which, as shownv in Figs.l2 and tered at this point by the meeting of the webs.

While I have described and illustrated in detail a specific embodiment of my inven-v tion, it should be clearly understood that the description is only for purposes of illustration and that manymodifications and variations will naturally occur to those skilled in the art. I aim in the subjoined claims to cover all such legitimate variations and modifie, tions. f

I claim as my invention:

1. A milling machine having, in combination, a hollow column having a front wall and two side walls, a base for the column, said base projecting forwardly of the column, a guide on the front wall of the column, a knee vertically slidable upon said guide, means for exerting force tending to separate the knee and said projecting portion of the base, a web extending rearwardly from the front wall of the column and from one side wall of the column to the other, and a vertical web extending across the angle between the front wall .of the column and the other web substantially midway between the two side walls of the column, said vertical webV extending into the forwardly projecting portion of the base.

2. A milling machine having, in combination, a hollow column having a front wall, a base for the column, said base projecting forwardly of theV column, a knee vertically slidable upon thek forward side of the column, means for exerting force tending to separate the knee and said projecting portionfof the base, and aV vertical web within the column and extending from the front wall of the column rearwardly so as to occupy the angle between said front wall and base', said web also extending into'the forwardly projecting portion of the base.

8. A machine'tool having, in combination, a hollow column7 a base projecting in front of said column, and a vertical web in said column projecting forward uninterruptedly into the front portion of said base.

4. A machine tool having, in combination, a hollow column, a base projectingl in front of said column, and a vertical web in said columnprojecting forward uninterruptedly into the front portion of said base, said base comprising a horizontal floor structure having a central deformation of an inverted U-shape, the bight of said deformation being integrally united to the upper edge of said vertical web.

5. A machine tool having, in combination, a hollow column, a central web in said column, said web projecting in front of said column, and a base supporting said column and projecting in front of the same, said base comprising a floor integrally united to the forwardly projecting portion of said web to furnish lateral support for the same.

`6. A machine tool having, in combination, a hollow column, a vertical web in said column, said web projecting in front of said column, a base supporting said column and integrally united to said web, and an additional horizontal web between the side walls of said ycolumn above the level of said base bracing the upper edge of said vertical web to said side walls.

7. A machine tool having, in combination, a hollow column, a vertical web in said column, said web projecting in front of said column, a base supporting said column and integrally united to said web, and an additional horizontal web within said column above the level of said base extending from the front wall of said column part way to the rear wall and bracing the upper edge of said vertical web to the front wall and the front portion of the side walls of said column.

8. A machine tool having, in combination, a horizontal column, a base projecting in front of said column, a longitudinal vertical web in said column projecting uninterruptedly forward into said base, a horizontal web bracing the upper edge of said vertical web to the side walls of said column, and a transverse vertical web bracing said firstmentioned vertical web to the side walls of the column, to the base and to said horizontal web. l

9. A machine tool having, in combination, a hollow column, a base supporting said hollow column and projecting in front of the same, a longitudinal vertical Vweb in said column projecting uninterruptedly forward into the front portion of said base, a horizontal web extending from the front wall of said column part way back and bracing the upper portion of said vertical web to the front wall and the front portion of theside verse web extending downward from said horizontal web and bracing saidA longitudinal vertical web to the side walls of the column, to the horizontal web and to the base. v10. A machine tool having, 'in combination, a hollow column, a base supporting said column and projecting in front of the same, said base having a floor, and a vertical web within said column projecting uninterruptedly forward into said base, said web extending above and below the floor of said base.V

11. A machine tool having, in combination, a hollow column, a base supporting said column and projecting in frontl ofthe same,y

1,352,849 l *f v j3` a longitudinal Vertical Web inside said column, and projecting uninterruptedly forward into said base, a transverse Vertical Web Within said column intermediate front and rear Walls thereof bracing said longitudinal vertical Web to the side Walls, said base comprising a floor integrally united to said Vertical Webs, and diagonal reinforcing flanges Carried by the floor of said base and extending from the intersection of said floor 10 and said vertical Welos-V diagonallyreap Wardly and outwardly to the rear corners of said base. v v

vIn testimony whereof, I havehereunto set my hand. 1 Y

` GUSTAF DAVID SUYNDSTRAND. 

